Upload
others
View
2
Download
0
Embed Size (px)
Citation preview
TABLE OF CONTENTS
1 INTRODUCTION 7
2 ABBREVIATIONS 8
3 HOW TO APPLY FOR ENVISAT DATA 9
3.1 ESA EO data policy 10
3.2 How to apply for Category 1 use 10
3.2.1 Application 10
3.2.2 Terms and Conditions 12
3.2.3 Project update 12
3.2.4 Price list 12
3.3 How to apply for Category 2 use 13
4 OVERVIEW ON ENVISAT PRODUCTS AND SERVICES 15
4.1 Instruments and products 16
4.1.1 ASAR 16
4.1.2 MERIS 16
4.1.3 AATSR 17
4.1.4 RA-2 and MWR 17
4.1.5 DORIS 18
4.1.6 SCIAMACHY 18
4.1.7 MIPAS 18
4.1.8 GOMOS 19
4.2 Services description 19
4.2.1 Mission planning 19
3
ACCESS TO ENVISAT DATA
TABLE
OF
CONTENTS
5.9 Access to SCIAMACHY data 46
5.10 Access to MIPAS data 47
5.11 Access to GOMOS data 48
6 HOW TO GET HELP 51
6.1 Help services 52
6.2 Order handling 52
6.3 Documentation 52
6.4 User complaints 53
6.5 Contact point 53
7 PRODUCTS AVAILABILITY SUMMARY TABLES 55
7.1 ASAR HR Products 56
7.2 ASAR LR Products 58
7.3 MERIS FR Products 59
7.4 MERIS RR Products 60
7.5 AATSR Products 61
7.6 RA-2 Products 62
7.7 SCIAMACHY Products 63
7.8 MIPAS Products 64
7.9 GOMOS Products 65
5
ACCESS TO ENVISAT DATA
4.2.1.1 Fixed planning and “user on-demand” planning 19
4.2.1.2 Background Regional Mission (BRM) 20
4.2.1.3 “Red Zones” 21
4.2.1.4 Priorities and conflicts handling 24
4.2.1.5 Constraints 25
4.2.2 Data acquisition 25
4.2.3 Data processing 26
4.2.4 Data dissemination 29
5 HOW TO ACCESS ENVISAT DATA 33
5.1 On-line access 34
5.2 Data ordering 34
5.2.1 Contact point 34
5.2.2 Catalogues and Ordering tools 35
5.2.3 Some ordering rules 37
5.3 Access to ASAR HR data 38
5.3.1 Ordering ASAR HR future acquisitions 38
5.3.2 Delivery of ASAR HR products 38
5.4 Access to ASAR LR products 40
5.5 Access to MERIS FR data 41
5.5.1 Ordering MERIS FR future acquisitions 41
5.5.2 Delivery of MERIS FR products 41
5.6 Access to MERIS RR products 42
5.7 Access to AATSR data 44
5.8 Access to Altimetry data (RA-2, DORIS) 45
5.8.1 RA-2 45
5.8.2 DORIS 46
4
ACCESS TO ENVISAT DATA
TABLE
OF
CONTENTS
TABLE
OF
CONTENTS
1. INTRODUCTION
In March 2002, the European Space Agency launched Envisat, an advanced polar-orbiting Earth
observation satellite which provides measurements of the atmosphere, ocean, land, and ice. Since then,
ESA distributes data that support earth science research and allow monitoring of the evolution
of environmental and climatic changes, facilitating the development of operational and commercial
applications.
The scope of this document is to focus on the data dissemination methods and the different means
offered to Users to access the Envisat data.
7
ACCESS TO ENVISAT DATA
INTRODUCTIO
N
HOW TO APPLYFOR ENVISAT DATA
2. ABBREVIATIONS
AO Announcement of Opportunity
BRM Background Regional Mission
DDS Data Dissemination System
DE Distributing Entity
EO Earth Observation
EOPI Earth Observation Principal Investigator
ESA European Space Agency
EWFS Envisat Web File Server
FR Full Resolution
FTP File Transfer Protocol
HR High Rate
LR Low Rate
MERCI MERIS Catalogue and Inventory
MR Medium Resolution
NRT Near Real Time
PAC Processing and Archiving Center
PI Principal Investigator
RA Rolling Archive
RR Reduced Resolution
SSR Solid State Recorder
8ABBREVIA
TIO
NS
The list of products that fall under this category is available on the EOPI web site.
When the requested data are subject to specific acquisition or dissemination constraints (e.g. ASAR
HR and MERIS FR) a category-1 proposal shall be submitted. The proposal is submitted to a peer
review process by the category-1 advisory group (and it takes approximately 8 weeks up to
acceptance notification). Assuming a positive scientific review, the proposal is accepted once the
feasibility, in terms of data and service provision, has also been confirmed. A quota of products is
allocated to the project at that time, with a decision whether acquisition requests can be placed or if
the quota is only for archived products.
In addition, ESA may release announcements of opportunity (AOs) to stimulate research on particular
topics and exploiting specific datasets. Objectives, conditions and timeframes for such AOs are specified
in the documentation associated to the opportunity and available on the EOPI Web site. Data are
normally provided in those cases free of charge.
3. HOW TO APPLY FOR ENVISAT DATA
3.1 ESA EO DATA POLICY
The ESA Earth Observation data policy was defined by the ESA Member States with the objective to
maximize the beneficial use of Envisat data and to stimulate a balanced development of science, public
utility and commercial applications, consistent with the mission objectives.
The conditions attached to the distribution of Envisat data shall depend on the use of the data.
The following two categories of use are defined:
Category 1 use: Research and applications development use of data in support of the mission
objectives, including research on long term issues of Earth System science, research and
development in preparation for future operational use and ESA internal use. Data for Category 1 use
are directly provided by ESA.
Category 2 use: All other uses, which do not fall into Category 1, including operational and
commercial use. Only ASAR data are considered within Category 2 use. Data for Category 2 use
are provided by Distributing Entities appointed by ESA.
The complete text of the Data Policy can be found on the ESA Earth Observation Principal Investigator
(EOPI) web site http://eopi.esa.int.
3.2 HOW TO APPLY FOR CATEGORY 1 USE
Application for Category 1 use data access can be submitted to ESA at any time, using the web interface
available within the EOPI web site http://eopi.esa.int.
3.2.1 APPLICATION
For data systematically acquired, generated and disseminated on-line (e.g. MERIS Reduced Resolution
data), a simplified category-1 request (Fast registration) can be submitted. Acceptance notification is
immediate.
11
ACCESS TO ENVISAT DATA
10
ACCESS TO ENVISAT DATA
HOW
TO
APPLY
FOR
ENVIS
AT
DATA
HOW
TO
APPLY
FOR
ENVIS
AT
DATA
Fig. 1 - EOPI Web Portal
3.3 HOW TO APPLY FOR CATEGORY 2 USE
There are two Distributing Entities, selected by ESA, that ensure access to Envisat data for Category 2
use (ASAR HR only).
In order to obtain Envisat ASAR HR data for commercial or operational application, please contact:
EMMA - represented by Eurimage
Customer Services
tel.: +39 06 406 94 222
fax: +39 06 406 94 232
e-mail: [email protected]
www.eurimage.com
or
SARCOM - represented by Spot Image
Sales department
tel.: +33.562.194040
fax: +33.562.194011
e-mail: [email protected] or [email protected]
www.spotimage.com
13
ACCESS TO ENVISAT DATA
HOW
TO
APPLY
FOR
ENVIS
AT
DATAFor information on the currently opened AOs, see the EOPI Web site.
3.2.2 TERMS AND CONDITIONS
Once the Project is approved, the Principal Investigator shall sign the Terms and Conditions for the
utilization of Category 1 use data, where he commits to use the data provided only for the purpose
defined in the accepted project, widely publish his results always referring to "data provided by the
European Space Agency" and provide regular progress reports to ESA.
The complete text is available on the EOPI web site.
The signed document, together with the list of agreed Co-PIs, shall be sent to the Earth Observation Help
and Order Desk ([email protected]) that will then provide ordering instructions or information
on how to access the on-line data.
Note
In the Category-1 Fast registration process instead, the document is signed during project submission.
3.2.3 PROJECT UPDATE
Whenever the existing PI has a need for an additional quota, different product types or a different
dissemination method (NRT, Rolling Archive, etc), he shall present the justification for the new needs
in a progress report. The request will be analysed by the Mission Manager and the Users Services.
3.2.4 PRICE LIST
The data are provided free of charge (in the specific case of an Announcement of Opportunity or if
available systematically on-line) or at reproduction cost, within the quota defined at project acceptance,
see “Envisat product prices for Category 1 use” on the EOPI web site. The invoicing is performed once a
year by the Earth Observation Help and Order Desk.
12
ACCESS TO ENVISAT DATA
HOW
TO
APPLY
FOR
ENVIS
AT
DATA
OVERVIEW ONENVISAT PRODUCTS
AND SERVICES
4.1.3 AATSR
The Advanced Along Track Scanning Radiometer (AATSR) ensures continuity of the ATSR-1 and ATSR-2
datasets of precise Sea Surface Temperature (SST), thereby ensuring the production of a unique 10 year
near-continuous dataset at the levels of accuracy required (0.3 K or better) for climate research.
Detailed information about the AATSR instrument operation modes and the corresponding AATSR
products can be found within the AATSR Product Handbook at:
http://envisat.esa.int/dataproducts/aatsr/CNTR.htm
whereas instrument status and performance are reported under:
http://earth.esa.int/pcs/envisat/aatsr/reports/cyclic/
4.1.4 RA-2 AND MWR
The Envisat Radar Altimeter (RA-2) is the continuity of the ERS-1 and ERS-2 Radar Altimeters, providing
improved measurement performance and new capabilities.
Operating over oceans, its measurements are used to determine the ocean topography, thus supporting
the research of ocean circulation, bathymetry and marine geoid characteristics and the wind speed and
significant wave height at sea, thus supporting weather and sea state forecasting. Furthermore,
the RA-2 is able to map and monitor sea ice, polar ice sheets and most land surfaces.
The Radar Altimeter signal is corrected using the measurement of the integrated atmospheric water
vapour column and cloud liquid water content from the Microwave Radiometer (MWR). In addition, MWR
measurement data are useful for the determination of surface emissivity and soil moisture over land, for
surface energy budget investigations to support atmospheric studies and for ice characterization.
Detailed information about the RA-2 and MWR instruments operation modes and the corresponding
products can be found within the RA-2-MWR Product Handbook at:
http://envisat.esa.int/handbooks/ra2-mwr/
whereas instruments status and performance are reported under:
http://earth.esa.int/pcs/envisat/ra2/reports/pcs_cyclic/
17
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES
16
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES 4. OVERVIEW ON ENVISAT PRODUCTS AND SERVICES
4.1 INSTRUMENTS AND PRODUCTS
General information about the Envisat mission, its space and ground segments can be found within
the Envisat web page at http://envisat.esa.int/.
4.1.1 ASAR
The Advanced Synthetic Aperture Radar (ASAR) operating at C-band ensures continuity with
the ERS-1/2 SAR instrument. It features enhanced capability in terms of coverage, range of incidence
angles, polarisation, and modes of operation.
Detailed information about the ASAR instrument operation modes and the corresponding ASAR products
can be found within the ASAR Product Handbook at:
http://envisat.esa.int/dataproducts/asar/CNTR.htm
whereas instrument status and performance are reported under:
http://earth.esa.int/pcs/envisat/asar/public_reports/
4.1.2 MERIS
The MEdium Resolution Image Spectrometer (MERIS) measures the solar radiation reflected by the Earth
and clouds, at a ground spatial resolution of 1200 m (Reduced Resolution) and 300 m (Full Resolution),
in 15 spectral bands in the visible and near infrared.
Detailed information about the MERIS instrument operation modes and the corresponding MERIS
products can be found within the MERIS Product Handbook at:
http://envisat.esa.int/dataproducts/meris/CNTR.htm
whereas instrument status and performance are reported under:
http://earth.esa.int/pcs/envisat/meris/reports/cyclic/
16
ACCESS TO ENVISAT DATA
many of the atmospheric trace-gases, playing a major role in atmospheric chemistry, have important
emission features.
The list of MIPAS products can be found within the Product Handbook at:
http://envisat.esa.int/instruments/mipas/data-app/dataprod.html
whereas the instruments status and performance are reported under:
http://earth.esa.int/pcs/envisat/mipas/reports/
4.1.8 GOMOS
The primary measurement objective of the Global Ozone Measurement (GOMOS) is the measurement
of the total column amounts and profiles of ozone and of other gases involved in the ozone photo
chemistry.
The list of GOMOS products can be found within the Product Handbook at:
http://envisat.esa.int/instruments/gomos/data-app/dataprod.html
whereas instruments status and performance are reported under:
http://earth.esa.int/pcs/envisat/gomos/reports/
4.2 SERVICES DESCRIPTION
This chapter briefly describes the data acquisition and processing chain, from instrument planning to data
delivery to the user.
4.2.1 MISSION PLANNING
The Envisat mission planning is performed at ESRIN based on the user requests and a set of predefined
rules aiming at using the satellite and its payload at its best, ensuring data availability to the majority of
the user community and resolving conflicts.
4.2.1.1 Fixed planning and “user on-demand” planning
The following Envisat instruments are operated according to a predefined and systematic planning:
19
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ESand:
http://earth.esa.int/pcs/envisat/mwr/reports/.
4.1.5 DORIS
The Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) is a tracking system
providing range-rate measurements of signals from a dense network of ground-based beacons. These
data are precision processed on ground providing the satellite orbit with an accuracy of the order of
centimetres. They are also processed on board to provide real time satellite positions with an accuracy of
some tens of centimeters.
In addition to enabling orbit determination, data are provided to:
help in the understanding of the dynamics of the solid Earth;
monitor glaciers, landslides and volcanoes;
improve the modeling of the Earth gravity field and of the ionosphere.
Detailed information about the DORIS instrument can be found at:
http://envisat.esa.int/object/index.cfm?fobjectid=1668
4.1.6 SCIAMACHY
The SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY (SCIAMACHY) primary
mission objective is to perform global measurements of trace gases in the troposphere and in the
stratosphere.
The list of SCIAMACHY products can be found within the Product Handbook at:
http://envisat.esa.int/instruments/sciamachy/data-app/dataprod.html
whereas instruments status and performance are reported under:
http://earth.esa.int/pcs/envisat/sciamachy/reports/
4.1.7 MIPAS
The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) is used for the measurement of
high-resolution gaseous emission spectra at the Earth's limb. It operates in the near to mid infrared where
18
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES
More information on the BRM is available at:
http://earth.esa.int/object/index.cfm?fobjectid=4045
4.2.1.3 “Red Zones”
A red zone is an area over which programming requests by users are restricted due to a specific
and permanent acquisition scenario in place. There are currently two of these areas:
First zone: North Sea + the Netherlands + Belgium + North-West Germany
Due to the high number of users over the area and in order to reduce the number of potential conflicts to
be handled, the following planning rules are applied, only over descending passes:
21
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ESAATSR, RA-2/MWR, SCIAMACHY, MIPAS and GOMOS, always in measurement mode;
MERIS Reduced Resolution, operated systematically over descending passes;
ASAR LR: ASAR Global Monitoring Mode over land and polar areas, ASAR Wave Mode over
oceans, when not operated in High Rate Mode, that is when no user request has been received
and no Background Regional Mission (BRM) is implemented.
On the other hand, MERIS Full Resolution and ASAR High Rate modes (Image Mode, Alternating
Polarisation Mode, Wide Swath Mode) are operated according to the user demand. In case of no user
demand for a particular time slot, the instrument is operated according to a predefined Background
Regional Mission (BRM) planning.
Important note: The ASAR instrument has 5 modes of operations: Image Mode (IM), Alternating
Polarisation Mode (AP), Wide Swath Mode (WS), Global Monitoring Mode (GMM) and Wave Mode (WV).
All these modes are mutually exclusive at a single time, the ASAR instrument can be operated only with a
single mode and sub-mode (i.e. unique imaging swath and polarization in the case of IM and AP).
Specific rules, detailed below, shall be applied whenever planning conflicts exist between ASAR User
requests.
4.2.1.2 Background Regional Mission (BRM)
The BRM is the default planning implemented when no specific user request has been received. The aim
is to systematically cover some areas in the operations mode most requested by the user community
and to fully exploit the resources of the satellite.
For example:
MERIS FR over land and coast;
ASAR WS coverage of sea ice.
20
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES
Fig. 2 - BRM Information
- over Sea: Wide Swath Mode with VV polarization23
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES- over Land : ASAR Image Mode beam 2 with VV polarization
22
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES
Category-2 users have higher priority and can cancel a previously entered Category-1 request. Within 2
weeks from sensing, no Category-1 order is accepted and a Category-2 request can only be accepted
if there is a free slot or if the Category-1 user is willing to give up the acquisition request. No request can
be planned within 2.5 working days from sensing except in very specific emergency situations, to be
approved by Management. A user request can be cancelled at any time by a calibration/validation activity
request or by emergency requests.
4.2.1.5 Constraints
While performing the instruments planning, the Mission Planners have to cope with the following system
constraints:
The ASAR can be operated for a maximum of 30 minutes per orbit, including 10 minutes in eclipse,
segmented in a maximum of 10 HR segments, each one having a minimum duration, depending on
the instrument mode (40 to 50 seconds) and a maximum duration of 10 minutes;
There is a transition time to be taken into account between ASAR operation modes;
The 37 ASAR operating modes are mutually exclusive;
Regarding the on-board Recorders:
ASAR HR and MERIS FR data cannot be recorded simultaneously
ASAR HR data cannot be downlinked in real time simultaneously with SSR dump of ASAR data
There are two ESA acquisition stations, acquiring data recorded on-board in Kiruna and ESRIN.
4.2.2 DATA ACQUISITION
Envisat data can be acquired worldwide and downlinked to ESA acquisition stations. This worldwide
capability is possible through the use of Artemis, the ESA Data Relay Satellite, and of the on-board
recorders.
The main ESA acquisition stations are located at ESRIN (Italy), for data transmitted via Artemis, and at
Kiruna (Sweden).
In addition, Regional Mission data (MERIS FR and ASAR HR modes) are acquired in Matera (Italy) and in
several acquisition stations not operated by ESA.
25
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ESThe following table lists the affected tracks.
NORTH SEA RED ZONE (ONLY DESCENDING PASSES)
Track Mode Polarisation Start time Stop time
22 WS V/V 9:46:15 9:47:37
65 WS V/V 9:51:57 9:53:51
108 WS V/V 9:57:39 9:59:41
151 WS V/V 10:03:21 10:05:23
194 WS V/V 10:09:03 10:11:05
237 WS V/V 10:14:47 10:16:47
251 WS V/V 9:43:24 9:44:40
294 WS V/V 9:49:06 9:50:41
337 IS2 V/V 9:55:49 9:57:08
380 IS2 V/V 10:01:37 10:02:51
423 IS2 V/V 10:07:27 10:08:30
466 WS V/V 10:12:02 10:13:11
466 IS2 V/V 10:13:36 10:14:14
Therefore, user requests for ASAR acquisitions are only accepted in the area over ascending passes.
Second zone: Italy
In the frame of a Business Development initiative from Eurimage, the Italian peninsula is systematically
covered according to the following scheme: ERS-like mode (IM, IS2, VV) over descending passes during
even numbered cycles and over ascending passes during odd numbered cycles.
The users have therefore access to programming requests over ascending or descending passes,
depending on the cycle.
4.2.1.4 Priorities and conflicts handling
Up to 15 days before acquisition, Category-1 users are served on a first in, first served basis while
24
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES
Product type Processing type at acquisition station
ASAR HR Medium Resolution
(APM, IMM, WSM)
ASAR LR Level 1 and 2
(ASA_GM1_1P, ASA_WVS_1P, ASA_WVW_2P)
MERIS FR over Europe
Level 1 and 2 (MER_FRS_1P and MER_FRS_2P)
MERIS FR acquired at Prince Albert and Gatineau stations
Level 1 and 2 (MER_FRS_1P and MER_FRS_2P)
AATSR Level 1 and 2
(ATS_TOA_1P, ATS_NR__2P, ATS_AR__2P, ATS_MET_2P) Product usually available 3 hours after acquisition
MERIS RR Level 1 and 2 (within 24 hours for MERIS FR Level 2 over North America)
(MER_RR__1P, MER_RR__2P, MER_RRC_2P,
MER_RRV_2P, MER_LRC_2P)
RA-2 Level 2
(RA2_FGD_2P, RA2_WWV_2P)
SCIAMACHY Level 1
(SCI_NL__1P)
GOMOS Level 1 and 2
(GOM_TRA__1P, GOM_NL_2P, GOM_RR_2P)
MIPAS Level 1
(MIP_NL__1P)
ASAR HR Level 0 and 1 On-request off-line processing (i.e. on user demand)
(All but the Medium Resolution)MERIS FR Level 1 and 2 Note: NRT service is available for a limited number of products,
(MER_FR__1P, MER_FR__2P, MER_FRS_1P, MER_FRS_2P) following preliminary agreement with EOHelp (Order Desk)
Near Real Time (NRT) and off-line processing
Products are generated either in Near Real Time at the acquisition facilities (typically 3 hours from data
acquisition for Low Rate data and one day for High Rate data) or off-line at the Processing and Archiving
Centers (PACs) any time from a few hours following the acquisition. Off-line products have the same
format and content of the NRT products, but benefit from a posteriori knowledge of calibration, auxiliary
data and precise orbit. They are called consolidated products.
27
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ESAcquisition constraint:
ASAR HR and MERIS FR data can only be acquired simultaneously within European stations masks and
Artemis coverage.
4.2.3 DATA PROCESSING
Envisat data processing to Level 0, Level 1 and Level 2 is performed in different ways:
Systematic and “user on-demand” processing at the acquisition stations
Products are generated either systematically, following data acquisition, or only when there is a specific
request from a user. The raw data originating from the following instruments are processed systematically:
- all Low Rate instruments;
- ASAR Global Monitoring and Wave modes;
- MERIS Reduced Resolution;
- ASAR HR (Medium Resolution products only);
- MERIS FR (over Europe and over the CCRS Canadian stations).
The ASAR HR High Resolution data and the remaining coverage of MERIS FR are instead only processed
on request.
The table below lists the products falling into each category.
26
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES
Data reprocessing
Data reprocessing is a regular activity as a consequence of the improvement of the processing
algorithms. It consists in gathering the full Level 0 consolidated dataset from one instrument and
generating the Level 1 and Level 2 corresponding products. The following has been performed:
Instrument Reprocessing
AATSR Done in 2008
ASAR Wave Done in 2006
MERIS RR Third reprocessing planned for 2009
GOMOS Third reprocessing planned for early 2009
MIPAS First reprocessing performed in 2005; second reprocessing planned early 2009
SCIAMACHY Second reprocessing performed in 2007-2008; Third reprocessing planned early 2009
RA2 Second reprocessing planned for 2008-2009
4.2.4 DATA DISSEMINATION
Envisat data products are delivered in different ways:
Delivery on media
CD-Rom and DVD-Rom are the traditional delivery methods used for orders of archived and future ASAR
HR and MERIS FR large products and also for orders of archived RA-2 products. LTOs is used in very
special cases when large volumes are involved.
Delivery via Internet
There are several interfaces for accessing the Envisat data available online:
Rolling Archive(RA)
Envisat Web File Server (EWFS)
Stations FTP servers
PACs FTP servers
FTP pick-up at PACs and stations
MERCI
29
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ESThe following table presents, for each category of products, the feasibility of NRT and off-line processing.
Products NRT processing at Acquisition Facility Off-line processing at PAC
ASAR Medium Resolution ASA_IMM_1P ASA_IMM_1P
ASA_WSM_1P ASA_WSM_1P
ASA_APM_1P ASA_APM_1P
Other ASAR HR all other ASAR HR products all other ASAR HR products
(on request, within 24 hours, limited service)
ASAR LR ASA_GM1_1P ASA_WVI_1P
ASA_WVS_1P
ASA_WVW_2P
MERIS FR MER_FR_1P (on request, within 24 hours, limited service) MER_FR_1P
MER_FR_2P (on request, within 24 hours, limited service) MER_FR_2P
MER_FRS_1P (European and North America coverages) MER_FRS_1P
MER_FRS_2P (European and North America coverages) MER_FRS_2P
MERIS RR MER_RR__1P MER_RR__1P
MER_RR__2P MER_RR__2P
MER_RRC_2P MER_RRC_2P
MER_RRV_2P MER_RRV_2P
MER_LRC_2P
AATSR ATS_TOA_1P ATS_TOA_1P
ATS_NR__2P ATS_NR__2P
ATS_AR__2P ATS_AR__2P
ATS_MET_2P
RA-2 RA2_FGD_2P RA2_IGD_2P
RA2_WWV_2P RA2_GDR_2P
RA2_MWS_2P
SCIAMACHY SCI_NL__1P SCI_NL__1P
SCI_OL__2P
GOMOS GOM_TRA_1P GOM_TRA_1P
GOM_LIM_1P GOM_LIM_1P
GOM_NL__2P GOM_NL__2P
GOM_RR__2P
MIPAS MIP_NL__1P MIP_NL__1P
MIP_NL__2P
28
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES
31
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES
30
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES Envisat Web File Server (EWFS)
When the user has a specific area of interest, the Agency advises the use of the EWFS instead of the Rolling
Archive to access the same product archives of Kiruna, ESRIN and Matera, from one single http address at
ESRIN (but the stations of Kiruna and Matera also have their local address, in case of problem).
In contrast to the full orbits provided on the Rolling Archive, the EWFS allows users to download a product
covering only a selected geographical region. Via the EWFS user interface, it is possible to select an area
of interest on a map and the list of products available at the ESA stations will be displayed beneath.
Stations FTP servers
The Kiruna and ESRIN FTP servers host 7 days of near-real-time systematic data production, mainly
meteo products and level 2 products. The products are available right after production, nominally within 3
hours from sensing. It is of interest for operational atmospheric and climate modeling applications.
For these services, access should be specifically requested in any new Category-1 proposal or during
Fast Registration process. For existing projects, access shall be requested to [email protected].
Rolling Archive (RA)
The Rolling Archive is a server available at the two main ESA acquisition stations of Kiruna (PDHS-K) and
ESRIN (PDHS-E). It contains 9 (ESRIN) to 11 (Kiruna) directories of products generated systematically
following the acquisition (nominally within 3 to 24 hours) and kept on-line for one to two weeks:
- ASAR systematic: ASAR IM, AP and WS Medium Resolution Level 1 products;
- ASAR GM systematic: ASAR GM mode Level 1 products;
- MERIS FRS systematic: MERIS FR full swath Level 1 and Level 2 products over Europe;
- MERIS FRS Level 1 and 2 products over North America;
- MERIS LR systematic: MERIS RR Level 1 and 2 products;
- AATSR systematic: AATSR Level 1 and 2 products;
- Browses: all browses.
The other 2 directories hold products generated on-request at the station and are used to satisfy
requests for NRT delivery of HR data. Orders are in most of the cases for future acquisition and
production when NRT access has been approved. However, this delivery method is now less frequent, in
favor of the new FTP pick-up mechanism.
It can also be used to distribute recent data (acquired in the last month as the archive of Level 0 at the
stations is limited in time), always in case of urgent delivery. The products involved are:
- ASAR HR on-request;
- MERIS FR on-request.
Matera is also hosting, on its Rolling Archive, its systematic production of ASAR HR Medium Resolution
and MERIS FR products and the generated on-request ASAR HR and MERIS FR products.
The Rolling Archive server only allows the user to download files corresponding to one acquisition
segment/orbit (in the form of zip compressed files). The product of interest can be identified by its filename
(with start time or orbit number).
Fig. 3 - Envisat Web file Server
PACs FTP server
The FTP servers from the French Processing and Archiving Centre (F-PAC) and the German Processing and
Archiving Centre (D-PAC) host most of the off-line systematic production of the centers. These are mainly
consolidated products, and they are available from 1 to 6 weeks after the acquisition date, with longer
retention time (from 2 months to the entire mission lifetime, see next section for details).
FTP pick-up at PACs and stations
The service is now available to any user as a specific order option in EOLI-SA. In this case, the data are
generated as soon as possible by the center receiving the order and once the product is available, the
user receives an E-mail (sender is [email protected]) notifying the data availability and its location (server
address, username and password). The user has then 7 to 10 days to pick up the product.
MERCI
MERCI is a web based application that gives access to the complete MERIS RR and AATSR
reprocessed datasets and newer data.
It allows the selection of a geographical area, the visualisation of the list of available products and the
Quick-Looks and the download of one or more files up to a volume of 1 GB (25 to 50 files, depending on
the size of the area of interest) corresponding to the time and area of interest. The tool is going to be
upgraded to allow download of larger volumes of data.
Delivery via satellite (DDS)
The DDS (Data Dissemination System) is a dissemination via the Eutelsat W1 satellite, using the Digital
Video Broadcasting (DVB) standard, to receivers located at user’s premises across Europe.
More detailed information on the DDS can be found at the address given below:
http://dwlinkdvb.esrin.esa.it/DDS/welcome.html. (The “general information” section and the ESA Bulletin
do not require a password). The DDS is intended to deliver NRT products right after their generation,
from both the ESRIN and Kiruna stations. Reception is on a 24hrs basis via a commercial TV dish
antenna connected to a dedicated PC equipped with a DVB card. ESA will provide 24hrs monitoring and
support via the Internet for PCs with a fixed IP address.
32
ACCESS TO ENVISAT DATA
OVERVIE
WON
ENVIS
AT
PRODUCTS
AND
SERVIC
ES
HOW TO ACCESSENVISAT DATA
35
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA5. HOW TO ACCESS ENVISAT DATA
This chapter describes the various tools for access to Envisat data.
5.1 ON-LINE ACCESS
A large volume of Envisat data are now available systematically on-line; see the instrument specific
sections below for the details. As mentioned in section 4.2.4, the products may be distributed
over the following facilities:
the RA (Rolling Archive)
the EWFS (ENVISAT Web File Server)
the DDS (Data Dissemination System)
the Stations or PACs FTP Servers
the FTP on-request service
MERCI
Whenever applicable, EOHelp will provide you at Project start-up (or on-request during the project), with
username, password and the server address where to download the products from.
5.2 DATA ORDERING
If the products are not available systematically on-line and have to be ordered, the EOLI-SA tool shall be
used. Browsing the data catalogue is possible by logging as an anonymous user while an account is
necessary to place an order.
5.2.1 CONTACT POINT
The ESA Earth Observation Help and Order Desk (“EOHelp”), located at ESA/ESRIN, is the contact point
for any information request on data access, data catalogues, ordering tools and data dissemination.
34
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA EOHelp can be reached at [email protected] or via http://earth.esa.int/contactus, and is open
during working days from Monday to Thursday, 8:30 to 17:15 and on Friday, from 8:30 to 16:00
(European Central Time).
Fax: 0039 06 94180 272
Telephone: 0039 06 94180 777
5.2.2 CATALOGUES AND ORDERING TOOLS
Data catalogues:
All Envisat data can be browsed through the ESA multi-mission data catalogue, EOLI, available at
http://earth.esa.int/resources/catalogues. There are two versions of EOLI:
EOLI-Web, an online multi-mission catalogue providing access to ESA's catalogues of EO products
via a standard web browser. This tool doesn't allow on-line ordering but browsing the meta data
and quick look images for ESA's ENVISAT, ERS and Third Party Mission products;
EOLI-SA, a stand-alone version combining the advantages of both the on-line and off-line
catalogues. It also allows visualisation of SAR interferometric searches and associated quick-looks.
For those who are used to DESCW, this catalogue is still available for browsing; it is an offline multi-
mission catalogue covering ERS, Envisat and ESA Third Party missions. Regular updates of the data for
use within DESCW are available via FTP.
For more information, refer to http://earth.esa.int/resources/catalogues.
5.2.3 SOME ORDERING RULES
When placing an acquisition order?
In the frame of a Category-1 data use Project, requests for planning can be entered at any time but at
the latest two weeks before acquisition.
Requests for Category-2 data use are instead accepted up to 2.5 working days before acquisition date.
Such a short-notice planning is subject to rush programming fee.
What are the priorities amongst users in case of planning conflict?
The Calibration and Validation team has priority at any time, as well as any emergency linked to satellite
and instruments safety.
Up to 15 days ahead of acquisition, a Category-2 request will cancel a Category-1 request while
Category-1 users are served on a first come, first served basis. It is therefore recommended that they
place their orders as early as possible.
Within 14 days from acquisition, when a new Category-2 request enters in conflict with an existing
Category-1 order, EOHelp handles a negotiation with the existing user.
How the user is informed about his acquisition request being accepted or cancelled?
The status of the orders placed with EOLI-SA can be checked in the Orders Panel; requests for
clarification can be sent to EOHelp.
Please note that a cancellation can always happen up to 15 days before acquisition time and more
exceptionally up to 2.5 days before acquisition because of higher priority requests. The user is informed
of cancellations as soon as they are known. In case of cancellation due to a conflict, the winning planning
is proposed and the user, whose order was cancelled, can accept if it satisfies his needs.
37
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA
Data ordering:
The data from the Envisat imaging instruments (ASAR, MERIS and AATSR) can be ordered using the
EOLI-SA tool.
EOLI-SA allows direct on-line ordering of the following products:
archived products from ASAR HR, ASAR GM, MERIS FR and AATSR
future data acquisitions of ASAR HR and MERIS FR
A personal account is needed and is provided by EOHelp at Project start-up or on request for on-going
projects.
The products are then delivered on media, on the RA or via FTP, depending on the preliminary agreements.
EOLI-SA also allows tracking the status of the order and in particular to verify whether the ASAR data
acquisition request has been scheduled or is in conflict with other users.
36
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA
Fig. 4 - EOLI-SA
ASA_IMM_1P and ASA_APM_1P. Only a planning request is needed from the user.
In nominal situation, the product is available within 3 hours from acquisition.
- in the “ASAR on request” directory of the Rolling Archive or via the EWFS, when the product is
generated following a user request. This is the case of the High Resolution Level 1 products:
ASA_IMP_1P, ASA_IMS_1P, ASA_IMG_1P,
ASA_APP_1P, ASA_APS_1P, ASA_APG_1P.
In nominal situation, the product is available within the same day of the acquisition.
- in an order-specific account for products smaller than 2 GB (FTP pick-up).
The user receives notification of the products availability and location in an E-mail. The product is
generated as soon as possible after acquisition, depending on processing load at the center.
If the request is instead for an archived product, it can be made available from the acquisition station
(recent acquisitions) or from a PAC (older acquisitions). In all cases, media and FTP pick-up delivery
methods are available as for new acquisitions.
The table summarizing the ASAR HR products availability is available in Section 7.1.
39
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA5.3 ACCESS TO ASAR HR DATA
5.3.1 ORDERING ASAR FUTURE ACQUISITIONS
As explained in section 4.2.1, ordering for future acquisitions is only needed for ASAR HR modes (ASAR
IM, ASAR AP, ASAR WS) and it is only allowed from users who have a Project with a quota allocated for
future acquisitions. Ordering shall be done using EOLI-SA, as described in Section 5.2.2. The order shall
include the instrument settings required (mode, polarisation, swath), the start/stop time of the acquisition
required to cover the area of interest and the final product type as well as the scene size when applicable.
If a medium resolution product is required from ASAR, an “acquisition only” request shall be placed, as the
production will be automatic and the product can be picked up on the Rolling Archive at no cost; only the
programming fee will apply.
5.3.2 DELIVERY OF ASAR HR PRODUCTS
The delivery option is specified at the time of ordering, using EOLI-SA.
The ASAR products are available in the following ways:
1. On media (CD-Rom or DVD-Rom, depending on the product size – one or more products per media).
This is applicable to all product types, archived products or future acquisitions.
In case of urgency, the product is generated as soon as possible following the acquisition at the station.
2. Via Internet
Whenever the order includes an acquisition request, the corresponding product can be made available in
the on-line archive of the acquisition station or via FTP pick-up. In this way, all ASAR Level 1 products,
generated systematically or on-request, are available at the stations where the data have been acquired
for a period of 7 to 15 days from generation time as follows:
- in the “ ASAR systematic” directory of the Rolling Archive or via the EWFS, when the product is
generated systematically. This is the case of the Medium Resolution products ASA_WSM_1P,
38
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA
Note
Reprocessed dataset:
The complete archive of ASA_WVI_1P products (Dec. 2002 onwards) has been reprocessed and the
ASA_WVS_1P and ASA_WVW_2P dataset is available to the users on a FTP server at the processing
center. Information on how to access these data can be requested to EOHelp.
The table summarizing the ASAR LR products availability is available in Section 7.2.
5.5 ACCESS TO MERIS FR DATA
5.5.1 ORDERING MERIS FR FUTURE ACQUISITIONS
As explained in section 4.2.1, this is only required for MERIS FR operations. Ordering shall be done using
EOLI-SA, as described in Section 5.2.2. The order shall include the coordinates of the scene center,
the scene size and the final product type required.
5.5.2 DELIVERY OF MERIS FR PRODUCTS
The delivery option (media or FTP pick-up) shall be specified at the time of ordering, using EOLI-SA.
If the product is systematically available in the Rolling Archive, a request for “acquisition only” is to be
submitted.
The MERIS FR products are available in the following ways:
1- On media (CD-Rom or DVD-Rom, depending on the product size – one or more products per media)
This is applicable to Level 1 and Level 2 products, archived products or future acquisitions. In case of
urgency, the product is generated as soon as possible following the acquisition at the station.
2- Via Internet
Whenever the order includes an acquisition and production request, the resulting product can be
41
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA5.4 ACCESS TO ASAR LR PRODUCTS
The ASAR LR products can be received:
1- On-request, by placing an order for a few archived products, using EOLI-SA for ASA_GM1_1P
products or sending an E-mail to EOHelp for ASA_WVI_1P products.
The E-mail shall include:
- The user project code ID
- The product type requested, the time period, the area of interest
- The preferred delivery support medium, if applicable
Products are in this case delivered on media (CD-Rom or DVD-Rom, depending on the size of the order).
2- Systematically, as a user of an on-line dissemination
Access information shall be requested to EOHelp, specifying your user project code ID. Access will be
provided to the stations FTP servers, RA or EWFS, depending on the product type:
Stations FTP servers (7 days retention time)
They host 7 days of Wave Mode Meteo products: ASA_WVS_1P and ASA_WVW_2P both in Envisat and
BUFR formats as well as 7 days of Global Monitoring Mode (GMM): ASA_GM1_1P.
RA or EWFS (7 days retention time)
The ASAR Global Monitoring Mode (GMM) products: ASA_GM1_1P are visible via the Rolling
Archive (in the ASAR GM1 systematic folder) and the EWFS.
3- Systematically, on DVD
The NRT ASA_WVI_1P can be delivered systematically, using a subscription on DVD, for all future
acquisitions or a period of time in the future (from PAC, with a few weeks delay).
The registration request shall be sent to EOHelp following Project acceptance. The user is then inserted
in the distribution list for systematic media delivery.
40
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA
For access to MERCI, please contact EOHelp.
2- Systematically, as a user of a DVD subscription.
For all future acquisitions or a period of time in the future; this is applicable to MER__RR__1P and
MER_RR__2P. The registration request shall be sent to EOHelp following project acceptance.
3- Systematically, as a user of the DDS.
This applies to all product types, MER_RR__1P, MER_RR__2P, MER_RRC_2P and MER_RRV_2P.
Information about setting up a DDS receiving station and/or access to products is available from EOHelp.
Note
MERIS RR catalogue can be browsed using EOLI-SA but ordering has been disabled since all data are
available on-line via the MERCI interface.
The table summarizing the MERIS RR products availability is available in Section 7.4.
43
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATAmade available both at the acquisition station or at a PAC, via FTP pick-up delivery method.
The user receives notification of the products availability and location in an E-mail. The product is
generated as soon as possible after acquisition, depending on processing workload at the center.
If the request is instead for an archived product, it can be made available from the acquisition station
(recent acquisitions) or from a PAC (older acquisitions). In all cases, media and FTP pick-up delivery
methods are available as for new acquisitions.
The table summarizing the MERIS FR products availability is available in Section 7.3.
5.6 ACCESS TO MERIS RR PRODUCTS
The MERIS RR products can be received:
1- Systematically, as a user of an on-line dissemination.
Access information shall be requested to EOHelp, specifying your user project code ID.
Access will be provided to the Stations FTP servers, RA, EWFS or MERCI, depending on the
product type and the area of interest:
Station FTP servers - (7-days retention time)
This is applicable to the MERIS RR Meteo products: MER_LRC_2P in both Envisat and BUFR formats.
RA or EWFS: (7-days retention time)
The MERIS RR Level 1 and 2 products MER_RR__1P and MER_RR__2P, MER_RRC_2P, MER_RRV_2P,
systematically generated at the acquisition station, are available in the “MERIS systematic” folder of the
RA or via the EWFS.
via MERCI, for the reprocessed dataset and the newer acquisitions as from July 2006 (full mission)
The complete MERIS RR dataset, from mid-2002 to June 2006 has been reprocessed; the full archive is
available on-line via the MERCI interface (see description in 4.2.4).
42
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA
Fig. 5 - MERCI (MERIS Catalogue and Inventory)
4- Systematically, as a user of the DDS
For the NRT AATSR Level 1 product ATS_TOA_1P and the NRT AATSR Level 2 Products ATS_AR__2P
and ATS_NR__2P.
Information about setting up a DDS receiving station and/or access to products is available from EOHelp.
The table summarizing the AATSR products availability is available in Section 7.5.
5.8 ACCESS TO ALTIMETRY DATA (RA-2, DORIS)
5.8.1 RA-2
The RA-2 products can be accessed:
1- On request, by placing an order for a cycle of products or more, sending an E-mail to EOHelp.
Products are in this case delivered on media (DVD-Rom) for RA2_GDR_2P and RA2_MWS_2P.
2- Systematically, as a user of a NRT on-line dissemination (7-days retention time).
Access information shall be requested to EOHelp, specifying your user project code ID.
Access will be provided to the stations FTP servers for:
RA-2 NRT product: RA2_FGD_2P
RA-2 Meteo product: RA2_WWV_2P (Envisat and BUFR format).
3- Systematically, as a user of an off-line FTP dissemination (full mission).
Access information shall be requested to EOHelp, specifying your user project code ID.
Access will be provided to the PAC FTP server for:
RA-2 off-line products: RA2_IGD_2P, RA2_GDR_2P
RA2_WWV_2P
45
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA5.7 ACCESS TO AATSR DATA
The AATSR products can be received:
1- On-request, by placing an order for a few archived products, using EOLI-SA*.
Products are in this case delivered on media (CD-Rom or DVD-Rom, depending on the product size)
or via FTP pick-up.
2- Systematically, as a user of an on-line dissemination.
Access information shall be requested to EOHelp, specifying your user project code ID. Access will be
provided to the stations FTP servers, RA, EWFS or MERCI, depending on the product type:Stations FTP servers (7-days retention time)
This is applicable to the AATSR Meteo product: ATS_MET_2P (Envisat or BUFR format).
RA or EWFS (7-days retention time)
The AATSR Level 1 product ATS_TOA_1P and AATSR Level 2 Products ATS_AR__2P and ATS_NR__2P
are available in the “AATSR systematic” folder of the RA or via the EWFS.
via MERCI
For the reprocessed dataset and the newer acquisitions as from July 2007 (ATS_TOA_1P and
ATS_NR__2P). The complete AATSR mission, from mid- 2002 to mid-2007, has been reprocessed. The
full archive is being made available on-line via the MERCI interface (see description in 4.2.4). For access
to MERCI, please contact EOHelp.
3- Systematically, as a user of a DVD subscription for all future acquisitions or a period of time in the
future (from PAC).
This is applicable to the AATSR Level 1 consolidated product ATS_TOA_1P and the AATSR Level 2
consolidated products ATS_AR__2P and ATS_NR__2P.
The registration request shall be sent to EOHelp following Project acceptance. The user is then inserted
in the distribution list for systematic media delivery.
* ordering will be disabled once the complete dataset will be available via the MERCI interface
44
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA
47
ACCESS TO ENVISAT DATA
46
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATAprovided to the station or to the PAC FTP server as applicable.
Note
Reprocessed dataset:
The SCIAMACHY archive, from August 2002 to September 2007 has been reprocessed. Access is
provided on the PAC FTP server, as for nominal products.
The table summarizing the SCIAMACHY products availability is available in Section 7.7.
5.10 ACCESS TO MIPAS DATA
The MIPAS products can be received:
1- Systematically, as a user of an on-line dissemination.
Access information shall be requested to EOHelp, specifying your user project code ID. Access will be
provided to the station or to the PAC FTP server, as follows:
Station FTP server (7-days retention time
MIPAS level 1 products: MIP_NL__1P
MIPAS level 2 products: MIP_NL__2P (currently interrupted)
MIPAS Meteo product: MIP_NLE_2P, ENV and BUFR formats (currently interrupted).
PAC FTP sever (historical dataset, full mission)
MIPAS Level 2 product: MIP_NL__2P
MIPAS Level 1 product: MIP_NL__1P
2- Systematically, as a user of DDS.
MIPAS Level 1 product: MIP_NL__1P
Information about setting up a DDS receiving station and/or access to products is available from EOHelp.
4- Systematically, as a user of a DVD subscription.
RA-2 off-line products: RA2_GDR_2P, RA2_MWS_2P
The registration request shall be sent to EOHelp following Project acceptance. The user is then inserted
in the distribution list for media delivery.
Note
Reprocessed dataset:
Cycles 9 to 15 from the RA-2 archive have been reprocessed. Access is provided on request, on media.
The table summarizing the RA-2 products availability is available in Section 7.6.
5.8.2 DORIS
The two DORIS auxiliary data files, DOR_VOR_AX and DOR_POR_AX are available on the ESRIN FTP
server for a period of 3 months. Access information shall be requested to EOHelp, specifying your user
project code ID.
5.9 ACCESS TO SCIAMACHY DATA
The complete dataset of SCIAMACHY products is available on-line as follows:
1- The NRT Level 1 products (SCI_NL__1P) can be retrieved from the stations FTP servers where the
products are kept for 7-days. Generation of Level 2 NRT products is currently interrupted.
Alternatively, level 1 NRT products (SCI_NL__1P) can be received via the DDS.
Information about setting up a DDS receiving station is available from EOHelp.
2- The off-line products can be retrieved from the processing and archiving center (PAC) FTP server, that is:
SCIAMACHY consolidated/reprocessed level 1 product: SCI_NL__1P
SCIAMACHY off-line product: SCI_OL_2P
Access information shall be requested to EOHelp, specifying your user project code ID. Access will be
46
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA
48
ACCESS TO ENVISAT DATA
Note
Reprocessed dataset:
The MIPAS archive, from July 2002 to March 2004, has been reprocessed. Access is provided on the
German PAC FTP server, as for nominal products.
The table summarising the MIPAS products availability is available in Section 7.8.
5.11 ACCESS TO GOMOS DATA
The GOMOS products can be received:
1- On-request, by sending an e-mail to EOHelp for very small orders of GOMOS level 1 products
(GOM_TRA_1P and GOM_LIM_1P).
Products are in this case delivered on media (DVD-Rom).
2- Systematically, as a user of an on-line dissemination
Access information shall be requested to EOHelp, specifying your user project code ID. Access will be
provided to the stations server or to the PAC FTP server:
Stations FTP servers (7-days retention time)
GOMOS Level 1 products: GOM_TRA_1P and GOM_LIM_1P
GOMOS Level 2 product: GOM_NL__2P
GOMOS Meteo Product: GOM_RR__2P, ENV and BUFR formats
PAC FTP server (historical dataset, full mission)
GOMOS Level 2 product: GOM_NL__2P
3- Systematically, as a user of a DVD subscription for all future acquisitions or a period of time in the
future (from ESA Acquisition stations and PAC).
GOMOS Level 1 products: GOM_LIM_1P and GOM_TRA_1P (NRT product)
The registration request shall be sent to EOHelp following Project acceptance. The user is then inserted
in the distribution list for systematic media delivery.
48
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA Note
Reprocessed dataset:
The GOMOS archive, from August 2002 to July 2006, has been reprocessed. Access to Level 2
products is provided on the PAC FTP server, as for nominal products.
The table summarising the GOMOS products availability is available in Section 7.9.
49
ACCESS TO ENVISAT DATA
HOW
TO
ACCESS
ENVIS
AT
DATA
HOWTO GET HELP
6.4 USER COMPLAINTS
Whenever a user is not satisfied with the delivered product(s) or service, he/she shall send an E-mail to
EOHelp with the following information:
- Project Code ID
- User ID
- Order ID (if applicable)
- Product affected
- Description of the anomaly
EOHelp might request the product to be sent back for investigation. If the problem is confirmed, the
product will not be charged to the project (financially and quota wise).
6.5 CONTACT POINT
EOHelp can be reached during working hours from Monday to Thursday, 8:30 to 17:15 and on Friday,
from 8:30 to 16:00 (European Central Time).
Fax: 0039 06 94180 272
Telephone: 0039 06 94180 777
E-mail: [email protected]
Web: http://earth.esa.int/contactus
53
ACCESS TO ENVISAT DATA
HOW
TO
GET
HELP
6. HOW TO GET HELP
The ESA’s EO User Services in ESRIN, Italy, is the entity ensuring a user-friendly interface between the
satellite system and the data users. Services provided to users include:
On-line information services (Earthnet online, EO Portal and Disasters Charter including documentation)
General Help services from the EO Help Desk team (EOHelp)
On-line catalogue ordering via EOLI-SA
Order Handling, inquiries and support
Mission planning and production planning
The interfaces to the Users are presented here below.
6.1 HELP SERVICES
Information on the missions, instruments, catalogues, ordering tools, products tools, data products and
how to access them is available at http://earth.esa.int/. In addition, the ESA Earth Observation Help and
Order Desk (“EOHelp”) is the contact point for requests of information and clarification on ESA and Third
Party Missions.
6.2 ORDER HANDLING
The EOHelp team is also responsible for the handling of on-request orders (from order validation to order
closure) and is the point of contact to request clarification on an order status. The team also provides
access to datasets systematically available on-line.
6.3 DOCUMENTATION
Any request for documentation shall be sent to EOHelp. Full list of the documents available can be found
at: http://earth.esa.int/resources/documentation/.
52
ACCESS TO ENVISAT DATA
HOW
TO
GET
HELP
PRODUCTSAVAILABILITY
SUMMARY TABLES
Level 0
Level 1
Product acronym
ASA_IM__0P
ASA_IMS_1P
ASA_IMP_1P
ASA_IMG_1P
ASA_IMM_1P
Max. sizeper scene(100 km length)(MB)
186
740
134
281
4
Distribution type
On request Planning
and Production
On request Planning
Systematic Production
Validity date
From 18 Oct. 2002
Distribution type(retention time)
DVD or FTP pick-up (up to 75 sec)
DVD or RA/EWFS (7 days)
or FTP pick-up
DVD or RA/EWFS (7-15 days)
or FTP pick-up
ACCESS TO ENVISAT DATAACCESS TO ENVISAT DATA
Product name
Level 0 HH/VV
HH/HV
VV/VH
Level 1 SLC
Geocoded
PRI
Medium
Resolution
Level 0
Level 1 Medium
Resolution
SLC
Product acronym
ASA_APC_0P
ASA_APH_0P
ASA_APV_0P
ASA_APS_1P
ASA_APG_1P
ASA_APP_1P
ASA_APM_1P
ASA_WS__0P
ASA_WSM_1P
ASA_WSS_1P
Max. sizeper scene(100 km length)(MB)
186
1480
562
268
8
709
59
1800
Distribution type
On request Planning
and Production
On request Planning
Systematic Production
On request Planning
and Production
On request Planning
Systematic Production
On request Planning
and Production
Validity date
From 13 Nov. 2002
From 30 Oct. 2002
PRODUCT DESCRIPTION AVAILABILITY
Distribution type(retention time)
DVD or FTP pick-up (up to 75 sec)
DVD or RA/EWFS (7-15 days)
or FTP pick-up
DVD (max. 300 sec.)
or FTP pick-up (max. 60 sec.)
DVD orRA/EWFS (15 days)or FTP pick-up (max. 150 sec)
DVD or FTP pick-up
7. PRODUCTS AVAILABILITY SUMMARY TABLES
7.1 ASAR HR PRODUCT
PRODUCT DESCRIPTION
Alternating
Polarisation Mode
AVAILABILITY
Wide Swath Mode
Image mode
SLC
PRI
Geocoded
Medium
Resolution
Product name
56 57
Distribution type
CD-Rom, DVD or FTP pick-up
CD-Rom, DVD or FTP pick-up
DVD or FTP pick-up
DVD or FTP pick-up
or Rolling Archive (7 days retention time for European
and North America coverages)
ACCESS TO ENVISAT DATAACCESS TO ENVISAT DATA
7.3 MERIS FR PRODUCTS
Product name
MERIS Full Resolution Level 1b
and Level 2
(1 scene, 650 x 582 Km length)
(1 imagette, 334 x 300 km length)
MERIS Full Resolution Full Swath Level
1B and Level 2
Product acronym
MER_FR__1P
MER_FR__2P
MER_FRS_1P
MER_FRS_1P
Max. size(MB)
156 (1 scene)
40-50 (1 imagette)
500
Validity date
from 15 June 2002
Future acquisitions
from 15 June 2002
Future acquisitions
PRODUCT DESCRIPTION AVAILABILITY
7.2 ASAR LR PRODUCTS
Product name
Level 1 SLC
Level 1 Cross spectra
(meteo product)
Level 2 Cross spectra
(meteo product)
Level 1
Product acronym
ASA_WVI_1P
ASA_WVS_1P
ASA_WVW_2P
ASA_GM1_1P
Max. sizeper orbit(MB)
2400 max.
2
2
146 max.
(1 segment)
NRTat PDHS(system/retention time)
-
FTP (7 days)
ENV and BUFR
formats
FTP (7 days)
ENV and BUFR
formats
FTP (7 days)
RA/EWFS (7 days)
Validitydate
From 17 Dec.
2002
Future
acquisitions
-
-
From 1 Jan.
2004
PRODUCT DESCRIPTION AVAILABILITY
Global Monitoring Mode
Consolidated at D-PAC Reprocessed at F-PAF
Distributiontype
On request
CD/DVD
Systematic
DVD
-
-
On request
CD/DVD
Validitydate
-
From 17 Dec.
2002 up to
Spring 2007
-
Distributiontype
-
FTP
-
Wave mode
58 59
Product name
Gridded Brightness
Temperature and
Reflectance
Geophysical Product
for Ocean, Land and
Atmosphere
Spatially averaged
Sea/Land
Geophysical Product
(AST)
Spatially Averaged
Sea Surface
Temperature (AST)
for meteo users
Product acronym
ATS_TOA_1P
ATS_NR__2P
ATS_AR__2P
ATS_MET__2P
Max. sizeper orbit(MB)
10 (scene)
764 (orbit)
2 (scene)
133 (orbit)
62 (orbit)
5 (orbit)
NRTat PDHS(system/retention time)
DDS
RA/EWFS (7 days)
DDS
FTP (7 days)
RA/EWFS (7 days)
DDS
FTP (7 days)
RA/EWFS (7 days)
FTP (7 days)
ENV and BUFR
formats
Validitydate
From
July 2007
From
July 2007
From
July 2007
-
Distributiontype
MERCI tool
MERCI tool
On request
CD/DVD/FTP
pick-up
-
Validitydate
July 2002
to July 2007
July 2002
to July 2007
July 2002
to July 2007
-
Distributiontype
MERCI tool
MERCI tool
On request
CD/DVD/FTP
pick-up
-
Product name
MERIS RR Level 1b
MERIS RR Level 2
MERIS RR Level 2
Cloud thickness &
water vapour
MERIS RR Level 2
Vegetation indices
MERIS RR Level 2
Cloud tickness &
later vapour
Product acronym
MER_RR__1P
MER_RR__2P
MER_RRC_2P
MER_RRV_2P
MER_LRC_2P
Max. sizeper orbit(MB)
537 (1 orbit)
45 (1 scene)
621 (1 orbit)
47 (1 scene)
104
87
9
NRTat PDHS(system/retention time)
DDS
RA/EWFS (7 days)
Systematic DVD
(off-line)
DDS
RA/EWFS (7 days)
Systematic DVD
(off-line)
DDS
RA/EWFS (7 days)
DDS
RA/EWFS (7 days)
FTP (7 days)
ENV and BUFR
formats
Validitydate
From 1 July
2006
from 1 July
2006
-
-
-
Distributiontype
MERCI tool
MERCI tool
-
-
-
Validitydate
17/06/2002
to 30/06/2006
-
-
-
-
Distributiontype
MERCI tool
-
-
-
ACCESS TO ENVISAT DATAACCESS TO ENVISAT DATA
7.5 AATSR PRODUCTS
PRODUCT DESCRIPTION
Consolidated at UK-PAC Reprocessed at UK-PAC
7.4 MERIS RR PRODUCTS
PRODUCT DESCRIPTION AVAILABILITY AVAILABILITY
Consolidated Reprocessed
60 61
Product name
Localised
Atmospheric Spectra
Vertical Column
Amounts of various
trace gases
Selected Vertical
Column amounts
extracted from
SCI_NL__2P
Vertical Column
amounts and Vertical
Profiles of various
trace gasses
Product acronym
SCI_NL__1P
SCI_NL__2P
SCI_RV__2P
SCI_OL__2P
Max. sizeper orbit(MB)
205
6
0.2
18
NRTat PDHS(system/retention time)
DDS
FTP (7 days)
FTP (7 days) (3)
FTP (7 days)
Envisat format
and BUFR format
-
Validitydate
From 25/09/ 2007
onwards
-
-
From 25/09/ 2007
onwards
Distributiontype
FTP
(permanent)
-
-
FTP
(permanent)
Validitydate
2/08/2002
to 24/09/2007
-
-
2/08/2002
to 24/09/2007
Distributiontype
FTP
(permanent)
-
-
FTP
(permanent)
Product name
Fast Delivery
Geophysical
Data Record
Intermediate
Geophysical
Data Record
Geophysical
Data Record
Sensor Data Record
Wind/Wave Product
(Meteo Product)
Product acronym
RA2_FGD_2P
RA2_IGD_2P
RA2_GDR_2P
RA2_MWS_2P
RA2_WWV_2P
Max. sizeper orbit(MB)
14
7 (1/2 orbit)
7 (1/2 orbit)
40 (1/2 orbit)
2 (orbit)
NRTat PDHS(system/retention time)
FTP (7 days)
-
-
-
FTP
ENV. and BUFR
format (7 days)
Distributiontype
-
FTP
(permanent)
FTP
(permanent)
On request
or systematic
DVD
On request
or systematic
DVD
On request via
FTP or media
(NRT product)
Validitydate
-
-
26/08/2002
to 28/04/2003
26/08/2002
to 28/04/2003
From
26/08/2002
Distributiontype
-
-
FTP
(permanent)
DVD
DVD
FTP (permanent)
(F-PAC product)
ACCESS TO ENVISAT DATAACCESS TO ENVISAT DATA
7.7 SCIAMACHY PRODUCTS
PRODUCT DESCRIPTION
Consolidated at D-PAC Reprocessed at D-PAC
(3) NRT service was stopped on 8 May 2006
7.6 RA-2 PRODUCTS
Validitydate
-
from 28 April
2003
from 28 April
2003
from 28 April
2003
from 28 April
2003
PRODUCT DESCRIPTION AVAILABILITY AVAILABILITY
Consolidated at F-PAC Reprocessed at F-PAC
62 63
Product name
Geolocated and
Calibrated Spectra
Temperature,
Pressure and
Atmospheric
Constituents Profiles
Temperature,
Pressure and
Atmospheric
Constituents Profiles
for Meteo Users
Product acronym
MIP_NL__1P
MIP_NL__2P
MIP_NLE_2P
Max. sizeper orbit(MB)
312
6
0.6
NRTat PDHS(system/retention time)
DDS
FTP (2)
(7 days)
FTP (7 days)
Envisat format
and BUFR format
Validitydate
From 09/08/ 2004
to 17/09/2004
with gaps
And from
10/01/2005 (1)
From 09/08/ 2004
to 17/09/2004
(with gaps)
-
Distributiontype
FTP
(permanent)
FTP
(permanent)
-
Validitydate
From
01/07/2002
to 26/03/2004
From
01/07/2002
to 26/03/2004
Distributiontype
FTP (permanent)
FTP (permanent)
(1) with theoretical duty cycle increasing from 35% to currently 100%(2) In red, the suspended distributions, due to interruption of nominal instrument operations since 26 March 2004
ACCESS TO ENVISAT DATAACCESS TO ENVISAT DATA
7.9 GOMOS PRODUCTS
Product name
Geolocated and
Calibrated
Transmission Spectra
Geolocated and
Calibrated
Background Spectra
Temperature and
Atmospheric
Constituents Profiles
Extracted Profiles
for Meteo Users
Product acronym
GOM_TRA_1P
GOM_LIM_1P
GOM_NL__2P
GOM_RR__2P
Max. sizeper orbit(MB)
22.8
14.4
0.6
1
NRTat PDHS(system/retention time)
FTP (7 days)
or Systematic DVD
(off-line)
FTP (7 days)
or Systematic DVD
(off-line)
FTP
(7 days)
FTP (7 days)
Envisat format
and BUFR format
Validitydate
From 5 July
2006
-
PRODUCT DESCRIPTION
Consolidated at D-PAC Reprocessed at D-PAC
Distributiontype
Contact
EOHelp
Contact
EOHelp
FTP
(permanent)
-
Validitydate
26 August
2002 to 04
July 2006
26 August
2002 to 04
July 2006
26 August
2002 to 04
July 2006
-
Distributiontype
Contact
EOHelp
Contact
EOHelp
FTP
(permanent)
-
7.8 MIPAS PRODUCTS
PRODUCT DESCRIPTION AVAILABILITY AVAILABILITY
Consolidated at D-PAC Reprocessed at D-PAC
-
64 65
Date 08 September 2008
Document reference EOEP-GSOP-EOPG-TN-06-0001
Version 1.1
Authors Veronique Amans, Henri Laur
Copyright ESA 2007
e-mail adresses [email protected]
web site http://earth.esa.int/contactus
telephone 0039 06 94180 777
fax 0039 06 94180 272
grap
hic
-avs
2008